Fix Plan

To address the question of exposing a standardized runtime evidence export hook, we can implement a callback hook in the agent framework.

Steps to Implement

• Define an interface for the evidence export hook:

from typing import Callable

EvidenceExportHook = Callable[[dict], None]

• Modify the agent framework to accept and call the evidence export hook:

class Agent:
    def __init__(self, evidence_export_hook: EvidenceExportHook = None):
        self.evidence_export_hook = evidence_export_hook

    def run(self):
        # runtime execution
        evidence = {'execution_id': 1, 'output': 'result'}
        if self.evidence_export_hook:
            self.evidence_export_hook(evidence)

• Implement the evidence export hook to produce verifiable evidence artifacts:

import hashlib

def export_evidence(evidence: dict):
    # create a verifiable evidence artifact
    artifact = {'evidence': evidence, 'hash': hashlib.sha256(str(evidence).encode()).hexdigest()}
    # export the artifact
    print(artifact)

# usage
agent = Agent(evidence_export_hook=export_evidence)
agent.run()

Verification

To verify that the fix worked, check that the evidence export hook is called correctly and produces the expected verifiable evidence artifacts.

Extra Tips

• Consider using a standardized format for the evidence artifacts, such as JSON or Protocol Buffers.
• Implement additional security measures, such as digital signatures or encryption, to ensure the integrity and authenticity of the evidence artifacts.